Blast-furnace top.



G. H. SMITH.

BLAST FURNACE TOP.

APPLIOATION FILED APR. 23, 1912.

- Patented July 2, 1912.

2 SHEETS-SHEET 1.

- INVENTOR \MTNEssEs G. H. SMITH.

BLAST FURNACE TOP. APPLICATION TILED APR.23, 1912.

Patented July 2, 1912.

2 SHEETS-SHEET 2.

a a W Q a A Y WITNESSES I g INVENTOR of blast furnaces lates to theconstruction and arrangement,

* UNITED sTATEs PATENT c ar on. v

GEORGE HAMPTONBHITH, OF ASPIFWALL, PENNSYLVANIA.

nms'r-ruima'cn Tor.

of the filling apparatus used ontop of the furnace :by which the furnaceburden is "charged into and distributed in the top. of

hoppers and in the distri necessary in altering or varying themannercomer (not shown).

the furnace shaft.

In the modern mechanically charged blast furnace it-frequently becomesnecessary to change the method or way in which the stock isdistributedwithin the furnace on account of irregularities in theworking of the furnace. In order to effect this change in distributionit is the practice to substitute' bells and hoppers of one size forbells and hoppers which are larger or smaller and to replace adistributing ring of one diameter with one of a different dlameter. Myinvention is designed to provide novel means whereby the chan sinthebells and uting rings found of distributing the charged materialsentering the furnaces are facilitated, repairs to the apparatus used incharging and distributing the burden forming materials in the furnaceare more easily and quickly accomplished and the time 0st in operatingthe furnace is greatly lessened.

' Referring to the drawings, Figurel is asect-ional elevation showingthe. top of a blast furnace shaft having .char 'ng. apparatus mountedthereon construe and arranged in accordance with my .'nvention. Fig. 2is a; similar sectional-elevation on an enlarged scale showin a portionof the apparatus illustrated inv ig'. 1.

In the drawings, 2 designates the furnace shaft, which is enlar ed andflares outwardly and then inwar ly at its upper. end, and leading fromthe enlarged flaring upper end 3 are the gas offtakes 4 by which thegases produced in the operation of thefurnace are led therefrom to thefurnace down- An inclined skip track car 6 in 5, which is provided witha and disski which the materials are hoisted charged into the top hopperwardly from the ground e Specification of Letters Patent. Applicationflied April 28, 1912. Serial No. 892,591.

Alle- 7, leads up-' vel to the topv Patented July 2, 1912.

The skip car 6 is arranged to tilt mechanicall materials hoisted t ereininto opper or chute 7.

5 and dum the conical rovided with a throat 8, preferably cylinrical incross section, and which normall is closed by means of the swinging gassea ing doors 9 hinged to the lugs 10 on the lower end of the throat 8.Each of the doors 9 is engaged by an anti-friction roller 1.1 on one endof the door operating levers 12 and the ends of the horizontal shafts 13suspende y a rod 19 from a bell operating mechanism in the usual mannerso as to raise and lower the bell 18 in discharging materials from thehopper 16 into the top of the furnace 2:

The flanged top of the hopper 16 is connected with the sides ofthe tophopper or chute 7 by means of thesectiona gas sealing hood 16 and thehopper 16 is mounted upon the conical hopper support 20 secured to thering 21, the ring 21 being fastened to the upper edge of t e conical toforming the upwardly and inwardly flar extension of the furnace shell22.

Suspended within the furnace by its flanged upper end from the upperedge of the conical shell 22 of the furnace is a dis tributing ring 24.The distributin ring 24 in Flg. 1 is of a diameter consi erably smallerat its lower end than the inside diameter of the refractory lining 25 inthe upper end of the furnace 'shaft 2. In the construction of Fig. 2,the distributing ring 26 (which is substituted for the ring 24 ofFig. 1) is much larger in diameter than the ring 24. The large and smalldistrlbutlng rings 24 and 26 are interchanged to vary the manner inwhich the materials will be disone of these rings ell'18 engages withthe lower edge. of the hopper extension 17. The bell 18 1s bemg removedand .re-

hopper or chute 7 above the furnace shaft as it reaches the top of theski car trac The lower, smaller end of the hopper 7 is Y is, lever 15 50.that the gases are taken from the furnace,

placed by another of different diameter when it is desired to change thedistribution of the coarse and fine materials forming the furnace burdenas deposited within the top of the furnace. a

- In some cases the hopper extension 17 and 7 bell 18 of Fig. 1 will bereplaced by a larger hopper-extension 17 and bell-l8, as shown In Fig.2, in order to efiect agreater change in the distribution of the stockas charged into the furnace. To facilitate the removal and thereplacement of the hopper extensions, bells and distributing ringswithout disturb ing the gas seal and top hopper, as has heretofore beennecessary, the support 20 for the hopperl'fi is made in sections and thegas sealing hood 1,6, which also is made in sections, is suspended fromthe top hopper 7 which'will be carried by or supported on thesuperstructure 27 located above the top of the furnace. The bottomhopper 16 is arranged to be suspended, when necessary, from the gasscaling hood 16, and the lower bell 18 which when not removed issuspended so as to be vertically movable, aids in supporting the hopper16 and gas sealing hood 16 after one or more sections of the conicalsupport 20 are disconnected and removed. The distributing rings 24 and2%; also are made in sections, of such size as can easily be handled,when disconnected in being removed. Each section can be removedseparately from the top of the furnace, be-

. tween the conical top of the furnace and the providing the enlargedupper end of the furnace shaft which is utilized to provide a convenientmeans for attaching the gas ofitakes 4 to the furnace and enlargesthearea of the furnace shaft at the point therein the enlarged areareducing the velocity of the gases passing out of the furnace so as toprevent or lessenlto'. a large extent the amount of finely dividedsolids carried from the furnace by theoutgoing gases. By

providing means whereby the bells, hopper.

extensions and distributing rings in the furnace are readily removed andeasily replaced changes-in the distribution of the stock in the furnaceare readily accomplished without disturbing the top riggingt Intestimony whereof, I have her Modifications in the construction of theparts may be made without departing from my invention, as defined in theclaims.

I claim 1. In a blast furnace, a closed top furnace comprising asectional hopper support mounted on the top of the furnace shell,'acharging hopper thereon, a closing bell for said hopper, and a sectionaldistributing ring suspended from the furnace shell, said distributingring being removable in sections from the furnace between the hopper andthe top of the furnace shell.

2. ln'a blast furnace, a closed top furnace comprising a sectionalhopper support mounted on the top of the furnaceshell, a charging hopperthereon having a'detachable sectional hopper extension, a closing bellfor said hopper engaging with said hopper extension,- and a sectionaldistributing ring suspended from the furnace shell, said distributingring and hopper extension being removable in sections from the furnacebetween the hopper and the top of the furnace shell.

3. In a blast furnace, a closed topv furnace having an open upper end, asectional hopper support detachably mounted thereon, a,

charging hopper mounted on and extending downwardly within said support,and a sectional distributing ring suspended from the top of the furnaceshell, the hopper being smaller than the opening in the top of thefurnace shell to permit the removal and replacement of the sectionaldistributing ring with the hopper in position on the furnace top.-

4. Ina blast furnace, a closed top furnace comprising an enlargedflaring furnace shell having a metal shell flaring outwardly and theninwardly, a refractory lining therefor,

of the shell, a hopper supported on said furnace shell having a hopperclosing bell, a support for said hopper forming a gas seal therefor, anda sectional extension on the hopper, said hopper support being arrangedin sections, the sections being removable to permit the insertion andremoval of. the

F. A. NICOLL, FREDW. Cnorr.

hopper extension with the hopper supported gas ofi'takes in the inwardlyflaring. portion unto set

